Standard GTI.
If i put my foot down in second or third theres a high pitch noise between 3.5-5K revs like a high pitch resonance.
Anyone any idea what it maybe?
The problem is i don't always drive this car and i cannot remember it been there before.

I have read about similar with induction kits, They talk about boost leaks maybe the cause, is this a common problem? If so could i monitor it with VCDS to check.
Anyone any ideas or is this normal once its a couple years old?
Thanks

Geoff.